Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[Rockhampton]

Hi all,

I've been following http://www.omegaowners.com/forum/YaBB.pl?num=1261254022/0#12 on misfiring - I today bit the bullet and went out into the cold to change my 2-4-6 coil pack, as the misfire was getting worse, and the emissions light was on constant (0300 random misfire & 0304 misfire cyl 4)  . I followed the excellent how-to, and only managed to break one of the DBW wiring cover tabs 
When I got the pack out, plugs 6 & 4 were very wet, as was the coil pack on those plugs. Plug 2 seemed okay. Removed the plugs (new 2k ago) and give them a good dry. The plug wells and the coil pack boots were wet and covered with rusty water, but there was NO oil and they did not smell of coolant. Cleaned all that out, put the whole lot back together with the new pack, and restarted . EML was on for the first four restarts, but now it has gone. Car drives lovely once more, took it for a good run, plenty of power, no misfire, great.
Obviously, I'm worried that this water is going to come back. 
Here are the clues I can offer:
Cyl 4 was the wettest, and the coil pack top had cracked and corroded, but there were more water marks on 6 - 2 pretty clean.
Rusty water colour seemed to start at the top of the well under the plenum side, not the lower rocker cover side, however water seemed to have risen right up the boots for 6 & 4
There was no oil in  there, and no smell of coolant
I've not lost any coolant since it was refilled in September - the coil pack had rusty water marks on it when the plugs were changed at that time, but all was bone dry.
I do park the car overnight on a fairly steep downhill slope, and I've had a couple of electrical issues with the alarm recently (going off when I start the car, or powersounder giving the beeps of death)
The 1-3-5 bank is clean and dry
Misfire worse when it was warm
Battery is fine
No other codes recorded.

Anyone got any suggestions on a postcard???

Thanks in advance! 

[tunnie]

check the condition of the rubber seal that runs along the bottom of the windscreen that forms the join the scuttle. Make sure water cannot get under this rather than flowing over the top like it should.

Secondly make sure the scuttle is joined together right, feel under neath the scutle and see if the padding is wet.

Another common leak is around the windscreen mechanism, water can get in around the edges, and soak into the sound proof, then drip onto the plenum / dis pack area

[Rockhampton]

check the condition of the rubber seal that runs along the bottom of the windscreen that forms the join the scuttle. Make sure water cannot get under this rather than flowing over the top like it should.

Secondly make sure the scuttle is joined together right, feel under neath the scutle and see if the padding is wet.

Another common leak is around the windscreen mechanism, water can get in around the edges, and soak into the sound proof, then drip onto the plenum / dis pack area

Cheers, Tunnie - I'm gonna get out there with the watering can tomorrow 
Have parked the car facing uphill now - It's not a solution, as if this is the problem, something else will just get wet - I just want to see what happens 

[unlucky mark mv6]

Hi all,

I've been following http://www.omegaowners.com/forum/YaBB.pl?num=1261254022/0#12 on misfiring - I today bit the bullet and went out into the cold to change my 2-4-6 coil pack, as the misfire was getting worse, and the emissions light was on constant (0300 random misfire & 0304 misfire cyl 4)  . I followed the excellent how-to, and only managed to break one of the DBW wiring cover tabs 
When I got the pack out, plugs 6 & 4 were very wet, as was the coil pack on those plugs. Plug 2 seemed okay. Removed the plugs (new 2k ago) and give them a good dry. The plug wells and the coil pack boots were wet and covered with rusty water, but there was NO oil and they did not smell of coolant. Cleaned all that out, put the whole lot back together with the new pack, and restarted . EML was on for the first four restarts, but now it has gone. Car drives lovely once more, took it for a good run, plenty of power, no misfire, great.
Obviously, I'm worried that this water is going to come back. 
Here are the clues I can offer:
Cyl 4 was the wettest, and the coil pack top had cracked and corroded, but there were more water marks on 6 - 2 pretty clean.
Rusty water colour seemed to start at the top of the well under the plenum side, not the lower rocker cover side, however water seemed to have risen right up the boots for 6 & 4
There was no oil in  there, and no smell of coolant
I've not lost any coolant since it was refilled in September - the coil pack had rusty water marks on it when the plugs were changed at that time, but all was bone dry.
I do park the car overnight on a fairly steep downhill slope, and I've had a couple of electrical issues with the alarm recently (going off when I start the car, or powersounder giving the beeps of death)
The 1-3-5 bank is clean and dry
Misfire worse when it was warm
Battery is fine
No other codes recorded.

Anyone got any suggestions on a postcard???

Thanks in advance! 

I had this problem with mine,and turned out to be the rubber seal on the dispack.

[Rockhampton]

check the condition of the rubber seal that runs along the bottom of the windscreen that forms the join the scuttle. Make sure water cannot get under this rather than flowing over the top like it should.

Secondly make sure the scuttle is joined together right, feel under neath the scutle and see if the padding is wet.

Another common leak is around the windscreen mechanism, water can get in around the edges, and soak into the sound proof, then drip onto the plenum / dis pack area

Just had a look this morning, and it would appear that the water is coming through and running over the lever that drives the central (passenger side) wiper - it's heavily water marked. That would make sense as if parked downhill, it's straight onto the plenum.
Just got to have a look where it's getting through now.... windscreen seal looks fine, wiper shaft looking favourite right now 
Thanks for pointing me in the right direction 

[nordic]

Had the same problem with mine.

I have placed tape across the bottom of the windscreen and over the rubber strip.

The rubber strip had warped and was letting water into the engine bay which put an end to my coil pack.

Also placed rubber around the wiper spindles to make them water tight too.

[tunnie]

check the condition of the rubber seal that runs along the bottom of the windscreen that forms the join the scuttle. Make sure water cannot get under this rather than flowing over the top like it should.

Secondly make sure the scuttle is joined together right, feel under neath the scutle and see if the padding is wet.

Another common leak is around the windscreen mechanism, water can get in around the edges, and soak into the sound proof, then drip onto the plenum / dis pack area

Just had a look this morning, and it would appear that the water is coming through and running over the lever that drives the central (passenger side) wiper - it's heavily water marked. That would make sense as if parked downhill, it's straight onto the plenum.
Just got to have a look where it's getting through now.... windscreen seal looks fine, wiper shaft looking favourite right now 
Thanks for pointing me in the right direction 

No problemo 

[Rockhampton]

Had the same problem with mine.

I have placed tape across the bottom of the windscreen and over the rubber strip.

The rubber strip had warped and was letting water into the engine bay which put an end to my coil pack.

Also placed rubber around the wiper spindles to make them water tight too.

Sounds like a plan for the next dry day (hopefully Friday!  ) - parked the other way at the mo to keep the water off the plenum as much as possible.
Thanks! 

[Rockhampton]

Had the same problem with mine.

I have placed tape across the bottom of the windscreen and over the rubber strip.

The rubber strip had warped and was letting water into the engine bay which put an end to my coil pack.

Also placed rubber around the wiper spindles to make them water tight too.

Finally got to the bottom of this, as I did not fancy shelling out for another coil pack anytime soon... leak was on the centre wiper spindle, or rather the padding around the hole - water running in, soaking into the padding over the plenum, and running down... if you squeezed the padding, it was like a sponge In addition, the scuttle was not clipped in properly, looks like someone has taken it off before.
Took the wiper arm off, and sealed the hole up with heavy duty silicon sealant - as well as the join in the scuttle  Fingers crossed that's sorted it, as it is tipping down now!

Thanks guys for your suggestions